A 58-year-old woman has been arrested for hosting a house party where a 16-year-old girl was raped by her school's football star.

Cathy Roberts was detained on Monday and charged with allowing minors to drink alcohol at her open event last Saturday.

She was placed under house arrest at home in Daphne, Alabama, and given an electronic ankle bracelet as she awaits trial.

Her arrest comes days after Spanish Fort High School football star Cameron Harrison, 18, allegedly admitted to raping the unidentified 16-year-old girl from his school while she was unconscious at the party.

Arrested: Cathy Roberts, 58, (left) has been arrested for hosting a house party at which 18-year-old Cameron Harrison (right) allegedly raped a 16-year-old girl as she lay unconscious at the event last Saturday

Harrison was arrested on Wednesday and charged with first-degree rape – and he allegedly confessed before he turned himself into police, authorities said.

Despite this, many other students at the school have taken the side of the star running back and vilified the girl on social media, according to police.

Daphne police are investigating threats the victim has been receiving online.

Police spokesman Jason Vannoy said any harassment of witnesses or the victim will be not be tolerated and those involved could face prosecution.